Pump



Fh 28A, 1933 Jrqs. ABERCROMBIEKET AL 1,899,299

PUMP

Filed Jan. 15, 1932' 'Patented- {uliu'rian- STATES* I-1 .1.Tr.N'r OFFICE JAMES S. ABERCROMBIE, JOSEPH A. TENN AND MESNE ASSIGNMENTS, TO` STEPHENS4 PUMP A CRPORATION' 0F DELAWARE K TEXAS, ASSIGNOBS, BY DIBFT COMPANY, 0F ROUND 300X, TEXAS,

Ami, AND HERBERT ALLEN, or iaous'ron,

PUMP

Application led January 15, 1932. Serial No. 586,907. y

This invention relates to pumps designed for pumping abrasive and corrosive fluids, of the general type disclosed by Letters Patent of the United States to Charles D. Stephens, .#1,832,259 of November 17th,1931.

This type of pump includes a pumped fluid chamber, inlet and outlet valves therefor, a

hollow expansible member within the cham-- ber, and a piston tov actuate fluid confinedv within the member to `cause expansion and contraction thereof, whereby fluid is drawn into the chamber through the inlet valve and forced out of theA chamber through the outlet valve.

The conventional expansible member com'- prises a rubber tube having an internal annular lar flange at the other, the flanges being clamped on the end walls of the chamber. When the flange clamping devices are tightened excessively by unskilled workmen in the field, the flanges are crushedl so that the ex- .pansible member becomes disconnected from the end walls of the chamber.

\To prevent this, the present invention has for-its ob'ect the provision of an expansible member aving new and improved means whereby it may be connected to the end walls of the pump chamber. v'

The preferred embodiment'of the invention is illustrated-by the accompanying drawing .of which Fig. 1 is a sectionall elevation of a portion of the pump; Fig. 2, a fragmentary external view of the ends of the expansible member; and Fig. 3, a fragmentary sectional view of the ends of the expansible member and the adjacent elements of the pump.

In the drawing, the pump barrel is indicated at 1. It defines a pumped fluid chamber 2, into which fluid is admitted through an inlet valve 3 and from which fluid -is per- -mitted to escape through anoutlet valve 4. 'Within t e chamber is .the expansible member 5. .Theny eral indicates thepiston.

When th pis on 6 is moved to the left by the rod 7 portion of the actuating flui confined within the member 5 is displaced, and the member 5 is thereby expanded to force the pum ed fluid out of the chamber 2 throught e outlet valve 4, the inlet valve 3 flange at one end and an external annui d flanges 5 b and remaining closed. moved to the right by the rod 7 the expansible member 5 contracts, outlet valve 4 closes, and* inlet valve 3 opens" to permit a fresh charge of fluid to enter the chamber 2. This operation is repeatedas the piston 6 is reciprocated, fluid being thereby pumped from the inlet pipe 8 through the outlet pipe 9.

The new and improved expansible member provided b this invention has a flexible body 5 a pre erably-made of rubber. One end o f this body is clamped between an external ring 5 b and an internal ring 5 0. The external ring 5 1) is L-shaped in cross section and extends inwardly to form an in'- ternal annular flange'5 b.

The other end of the body 5 a is clamped between an external ring 5 cl and an internal ring 5 6. The internal ring 5 e is substan tially L-shaped in cross section and' extends outwardly to form anexternal annular flange 5 6. 4

`The flange 5 6 is clamped between the holding element 10 and one end Wall l1 of the chamber 2. Suitable askets 12 may be placed on either side of t e flange 5 5 to seal the parts together.

The flange 5 eis clamped between the vholding element 13 and an internal annular flange 14 in the other end wall of the chamber 2. Suitable askets 15 may be placed on either side of t e flange 5 6 to seal the parts together. i

The holding element 10 may be moved toward the adjacent end wall of the cylinder by rotating the element 16 to which it is threaded as indicated at 17 and the holding element 13 may be securedpto the barrel by suitable bolts 14.

The rings 5 5, 5 0, 5 d and 5 9 are preferably made of some metal, for example steel, that is rigid and capable of resisting relatively7` great crushing forces, so that the expansible member 5 may be `easily mounted in the correct position in the `chamber' and the 5 e will not be crushed if the holding elements 10 and 13 are excessively tightened.

We claim:

1. A pump .having` a chamber; inlet and When the piston 6 is y lOl.

annularmetallic flange outlet means for said chamber; a pumping member in said chamber and having 'a tubular, flexible rubber body; inner and outer rigid metallic rings between which` one end of said body is clamped, saidouter ring being substantially L-shapedin cross section and extending inwardly to form an internal annular flange; inner and outer rigid metallic rings between which the other end of said body is clamped, the inner ring of said latter rings being substantially L-shaped in cross section and extending outwardl to form an external annular flange; said flanges being capable of resisting relatively great crushing forces; means to clam said flanges to the end walls of said chamber; and means to expand and contract said member to draw fluid into said chamber through said inlet means and to force it out of said chamber through said outlet means.

2. A- pump having a chamber; inlet and outlet means for said chamber; a pumping member in said chamber and having a tubular, lflexible body, a metallic external flange on one end, and a the other end, said flanges being capable of resisting relatively great crushing forces; means to clamp said flanges to the end walls of said chamber; and means to 'expand and contract said member to draw fluid into said chamber through said inlet means and to force it out of said chamber through said outlet means.

3. A pump having a chamber; inlet and outlet means for said cham r; a pumping member in said chamber, and having a tubular, flexible body, a metallic external flange on one end and a metallic internal flange on the other end, said flanges being rigid; means to clamp saidflanges to the end walls of said chamber; and means to expand and contract said member to draw fluid into said chamber through said inlet means and to' force it out of said chamber through said outlet means.

4. 'A pumping member having a tubular, flexible body; inner and outer rings between which one end of said body is clamped, said outer ring being substantially L-shaped in cross section and extending inwardly to form an internal annular flange; and inner and outer rings between which the other end of said bodyis clamped,the inner ringofsaid latter rings being substantially L-shaped in cross section and extending outwardly to form an external annular flange; said flanges being capable of resisting relatively great crushing forces.

5. A pumping member having a tubular,

flexible rubber body; metallic flange at one an external annular end; and an internal at the other end; said flanges being capable of resisting relatively great crushing forces. Y

metallic internal flange on- In testimony whereof, we hereunto aix cursignatures. JAMES S. ABERCROMBIE. f JOSEPH A. TENNANT.

HERBERT ALLEN.- 

